Chromium Concentrate Recovery from Solid Tannery Waste in a Thermal Process

Stanisław Famielec


Leatherprocessingrequiressubstantialinputsofenergy,waterandchemicals. Additionally, it generates significant amounts of liquid and solid waste, severely impacting the environment. Processing 1 Mg of raw hides yields up to 600–700 kg of waste, considerable amounts of which are solid tannery waste. Such waste contains chromium (Cr) compounds, which are commonly used as tanning agents. This paper reviews solid tannery waste treatment technologies, with emphasis on waste incineration in a specially designed experimental tunnel incinerator. Three different types of tannery waste were subjected to tests: trimmings, shavings and buffing dust. As the research revealed,theprocesscanbeappliedtoalltypesofsolidtannerywaste. Moreover,itenablesthereuse of the heat of the process and results in a Cr concentrate in the process residues. The conducted analyses (carbon, hydrogen and nitrogen elemental analysis; inductively coupled plasma optical emission spectroscopy; powder X-ray diffraction) proved that there is no or little organic content in the obtained residual ash, which contains up to 53.1%(w/w) Cr in the form of Cr (III) oxide. Such material may be used as a Cr ore substitute in the chemical or metallurgical industries.
Author Stanisław Famielec (FoPaPE / IoAEaI)
Stanisław Famielec,,
- Institute of Agricultural Engineering and Informatics
Journal seriesMaterials, ISSN 1996-1944, (N/A 140 pkt)
Issue year2020
Publication size in sheets0.6
Article number1533
Keywords in Englishtannery waste; chromium recovery; chromium concentrate; waste incineration
ASJC Classification2500 General Materials Science
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
Chromium Concentrate Recovery from Solid Tannery Waste in a Thermal Process of 09-04-2020
1,36 MB
Score (nominal)140
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.285; WoS Impact Factor: 2018 = 2.972 (2) - 2018=3.532 (5)
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Finansowanie The construction of the experimental installation for waste incineration was supported by the Ministry of Science and Higher Education (Poland), Project No. N R14 0028 06. This research paper was financed by the Ministry of Science and Higher Education of the Republic of Poland.
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